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Mean

If the mean o...

Question

If the mean of 6, 4, 7, p and 10 is 8, then the value of p is

A

12

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B

13

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C

14

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D

15

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Solution

The correct option is B
13
$¯ ¯ ¯ x = \frac{sum of all observations}{n o . o f a l l o b s e r v a t i o n s} = 8 \Rightarrow \frac{6 + 4 + 7 + p + 10}{5} = 8 \Rightarrow 27 + p = 40 \Rightarrow p = 40 - 27 ∴ p = 13$

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